diff --git a/gnu/packages/python-xyz.scm b/gnu/packages/python-xyz.scm
index db2ab8e5f0..450d17208f 100644
--- a/gnu/packages/python-xyz.scm
+++ b/gnu/packages/python-xyz.scm
@@ -8478,7 +8478,7 @@ (define-public python-jupyter-core
     ;; search paths.
     (native-search-paths
      (list (search-path-specification
-            (variable "JUPYTER_CONFIG_DIR")
+            (variable "JUPYTER_CONFIG_PATH")
             (files '("etc/jupyter")))
            (search-path-specification
             (variable "JUPYTER_PATH")
@@ -12145,8 +12145,6 @@ (define-public python-nbconvert
              (when tests?
                ;; Some tests invoke the installed nbconvert binary.
                (add-installed-pythonpath inputs outputs)
-               ;; Tries to write to this path.
-               (unsetenv "JUPYTER_CONFIG_DIR")
                ;; Tests depend on templates installed to output.
                (setenv "JUPYTER_PATH"
                        (string-append
@@ -12254,6 +12252,8 @@ (define-public python-notebook
                ;; Some tests do not expect all files to be installed in the
                ;; same directory, but JUPYTER_PATH contains multiple entries.
                (unsetenv "JUPYTER_PATH")
+               ;; Interferes with tests that check paths.
+               (unsetenv "JUPYTER_CONFIG_PATH")
                ;; Some tests need HOME
                (setenv "HOME" "/tmp")
                (with-directory-excursion "/tmp"